Pick for loading machines



Filed Feb. l0, 1943 Inventor Homey Patented Feb. 27, 1945 PICK FORLOADING MACHINES Matthew Smith Moore, Malvern, England, as-

signor of one-half to The Mining Engineering Company Limited, Worcester,England Application February 10, 1943, Serial No. 475,426

In Great Britain February 10, 1942 4 claims." (o1. 19a-9) Loadingmachines with revolving bars preferably have removable and replaceablepicks or teeth of varying formation. It is found in practice that inloosened coal, pieces may become fast or jammed and require releasing,and that the single-pointed pick cuts a path through the coal, or chipsit without dislodging it.

According to the present invention, it is proposed to form two or morepoints or projections on the pick head in ian formation, preferably withthe foremost point at no greater radial distance from the bar centrethan a subsequent blunt point. Coal usually settles from the roof onbeing under-cut, and the formation gives it a heaving and forwardrolling tendency towards the loader conveying belt. One of the pointsmay be centrally disposed above the pick shank and may be much extendedin forging to act as a chucking medium for turning the shank, beingparted off to act as the contactor point for driving the pick into itsposition in the bar. The blunt projection preferably lies just ahead ofthe leading point of the adjacent pick when the picks are arranged inhelical formation on the loading bar and not only ensures that the coalis dislodged but saves jamming and helps to initiate the heaving androlling action.

In the accompanying drawing- Fig. 1 is a side view of a pick,

Fig. 2 is an end view, and

Fig. 3 a section of a loader showing picks fitted in revolving loadingbars.

Figs. 1 and 2 show a preferred form of pick with shank I and head 2including the central projection 3 over the shank, forward point 4 andrear point 5. The forward point 4 is shown pick pointed at 4a. The picksare arranged in double helical formation by driving the Shanks intoholes drilled through the revolving loader bar 6. The loader is shownmoving in the direction of the arrow with the right-hand loader bar inaction, the picks passing between the teeth 'l of the comb 8 anddelivering the coal onto the conveyor 9, the machine except for theloader bar being of l known form- I claim:

l. A revolving loading bar with removable and replaceable picks, saidpicks each comprising a shank to be driven into the loading bar and ahead having a plurality of projections in fan-like formation, one of theprojections having a point extending forwardly in the direction ofrotation and another projection being disposed over the .shank beingblunt and extending further from the remote end orf the shank than thesaid point.

2. A construction as deilned in claim 1, wherein each blunt projectionextends at least as far from the center of the loading bar as the point.

3. A pick for a revolving loading bar having a turned shank and a headwith three projections in fan-like formation, said projections includinga central blunt projection disposed over the shank and extending to agreater distance axially of the shank than either of the other twoprojections, one of the remaining projections forming a leadingprojection and hI/ing a pick point.

4. A revolving loading bar with a number of removable and replaceablepicks, each including a shank driven rmly into the loading bar inhelical formation, a leading point and a blunt projection extending atleast as far from the center of the bar as the point, the bluntprojection of one pick lying just ahead of the leading point of anadjacent pick.

MATTHEW S. MOORE.

